Support for electrooptical apparatus



March 16, 1948. A. G. cooLEL- Y SUPPORT FOR ELECTROOPTICAL APPARATUS Filed Dec. 30, 194 1 4 Sheets-Sheet l PL :1 w fi INVENTOR. AusW/v C7 C00LY ATTO/P/VEV March 16, 1948. A. G. COOLEY SUPPORT FOR ELECTROOPTICAL APPARATUS 4 Sheets-Sheet 2 Filed Dec. 30, 1944 INVENTOR.

March 16, 1948. A. G. CCOLEY SUPPORT FOR ELECTROQPTICAL APPARATUS Filed Dec. 30, 1944 4 Sheets-Sheet 5 INVENTOR. usw/v G COOL/5V Xiffi March 316,

/ G. COCLEY 2,43 R w w SUPPORT FOR ELECTROOPTICAL APPARATUS Filed Dec. 30, 194-41 4 Sheets-Sheet 4 TirTlE.

Patented Mar. 16, 1948 :APPARATU Austin G. Cooley, New Ycrk,.-N. Y.,assignor-to Times Facsimile Corporation a corporation. of

New York Application December 30, 19 1 4;Scr ial .No. 57-0;602

.3'Claim's. 1 This invention relates to electro-opticalapparatus and more especially to scanning headsifor facsimile transmitters and the like.

A principal object is to provide an improved facsimile scanning head which iscapable of easy and accurate adjustment with respect to the subject matter being scanned.

Another object is to provide a scanning head having a novel adjustable mounting for theilight source with respect to .the subject matterbeing scanned and with respect to the lightiresponsive cell.

A feature of the invention relates to a'novel eccentric-controlled mounting supportfora scan- .ning lamp whereby the lamp filament can be adjusted to the optimum eflective position.

A further feature relates to an "improved 'assembly unit comprising an optical system, light source and light-sensitive cell'housin'g-which can be easily and expeditiously mounted and -adjusted.

A still further feature relates to the novel organization, arrangement and relative location of parts which cooperate to provide an improved scanning head for facsimile transmitters and the like.

In the drawing which shows one preferred form,

Fig. 1 is a side viewof the improved scanning head according to the invention.

Fig. 2 is a right-hand end view of Fig. 1.

Fig. 3 is a left-hand end view of Fig. 1.

Fig. 4 is a top-plan view of Fig. 1.

Fig. 5 is a sectional view of Fig. 1 taken along the line 5-5 thereof, and viewed in the direction of the arrow.

Fig. 6 is a detailed sectional view of the condenser lens subassembly of Fig. 1.

Fig. 7 is a detailed sectional View of the objectivelens barrel unit.

Fig. 8.is an end view of one of the eccentric lamp adjusting members.

.Fig. 9 is a side view of Fig. 8.

Fig. 10 is a right-hand end view of Fig. :9.

Figs. 11 to 15 are diagrammatic views 'exp'lanatory of the manner in which theeccentric cadjustments are efiected.

Fig. .16 is a plan view of the lamp mounting block.

In certain kinds of facsimile equipment, it is customary to use as the light source an incandescent filament lamp having a small concen trated filament. One of the serious problem-5 in the use of such lamps is to bring the filament lnto accurateor optimum focus with respect to and: the vobjective .lens unit 4.

the subjectimatter-being scanned. Furthermore, since the filament is not a true spot or planar lightsource, .itfis also necessary to adjust the lamp .so :as toobtain the optimum uniformity of .spot illumination .on the subject matter. The .present invention provides readily adjustable means for accomplishingnot -only the focus-sing adjustment-but also the optimum position of the lamp filament.

:Referringtothe drawing, the device-comprises inrgeneral, four major units :01 subassemblies, ;namely the light cell and housing unit 1,; the light source :unit 2,; the condenser lens unit 3.; The units 2, 3 amid are :adjustably. mounted on the housing unit L. is shown in Fig. :5, the light cell jhousing "comprises .a metal box-like casting having solid side walls 5, 6, and'iront 'and rear walls land 8. :The housing :alSo has ;an inolined'ifront wall :section 9101: which :is adjustably fastened the acondcnserIlens unite. Unit :3 comprisesn pair of contlenser lenses 130, M (Fig. :6), which :are sp'acedin fixedirelationhya cylindricalsleeve .12 and suitable lretainer rings 21:3 and .14. The lens .unit =3i-is Liast'ened within .the :annula'r p'ortion iii of a metal casting 'Whic'hiis.integrallyformed with :a fiat 'i'oot portion l6. lPcrtion "I6 is pro- 'vided with two slots ii?! :and is through which pass the screws 19 and I20 for fastening 'Illiit P3 "to the inclined-part9 of the housing. Thus the condenser lens unitcan be adjusted laterally ':to either side. of the :central vertical axis :of the housing and then :fastenediin' place by screwsilfi, '20.

iable apertureildightstops 25 and 26,.are fastened within tube 2 'and lthE right-hand @end of the tube .lls :closed by a plate 121 :having ;a small :cen- .tral aperture '28. The lens barrel of .Fig; .7 is rigidly clamped-between the spaced arms-29,.30, of a diagonally split casting 3|, which has :arcirtcular horefl tozreceive barrel .21. A tightening screw F33 clamps .the'arms .29 and .30 together thus rigidly .holding the barrel in place- The .acastiug .3! also has two lugs 34, 3.5, to receive :screws .36, I3] by means of which the Jens :b'arrel innit-'4 isrigidly i astened to the front wall :1 of the-housing. Thus by loosening screw 33, the :barrelcan be adjusted longltudinallywith respect to the surface 33 to be scanned. This surface is shown diagrammatically in Fig. 1 and may comprise a sheet or strip containing the subject matter to be transmitted which sheet or strip is supported on a rotating scanning drum 39. The drum ma be subjected to aieeding movement and to a rotary movement in order to bring each successive elemental area of the subject matter in registry with the scanning head. For a, detailed description of a suitable scanning drum and operating mechanism therefor, reference may be had to U. S. Patent No. 2,138,784, granted November 29, 1938.

The bottom of housing iis closed by a metal plate 40 in which is rigidly anchored a suitable receptacle or socket 4| into which may be plugged any well-known form of photo-electric cell 42. A suitable moisture-proof gasket 43 is interposed between the plate 50 and the bottom of the housing. In order to facilitate removal of the'cell, there is provided an inverted U- shaped' wire member tgone arm of which extends downwardly along the outside wall 5, and

the other arm 55 of which extends downwardly within the housing. The arm :36 has its end t? bent at right angles and to circular shape so as to embrace the base 48 of the cell. The eX- terior .arm 44, extends down through a guide 4'9 which is fastened to wall 5 by screws 5B, 5!. The lower endofarm 54 has a right-angled portion 52 for manipulating the cell. it packing 753 (Fig. 5) of felt, sponge rubber or the like is inserted into the top of the housing and abuts against the upper end of cell A2. A metal cover .plate 54 closes off the top of thehousing and isheld in place by screws 55, 56, the latter screw cooperating with a' right-angled downwardly extending lug 51 on plate 5 3.

When it is desired to remove .the cell, screws 50 and 5| are loosened and the arm 44 is raised by pressing upwardly on lug 52, thus causing the portion 4'! to abut against the shoulder 58 on cell 42 and thereby withdrawing the .cell from its socket. M. When the cell is raised sufliciently out of the housing, it may be readily grasped-and entirely removed therefrom.

The. lamp unit 2 comprises a suitable concentrated filament incandescent lamp. -66, whichis adapted to beplugged into .a lamp socket 6!.

.Socket 6! is fitted within a circular" opening in aninsulation block 62 which is split at- 63 and.

a tightening screw 64- passes through the split portionsito clamp'th'em together. The socket BI is preferably of the bayonet type having one '.or. more slots 553m its cylindrical side-wall to receive the usual bayonet pins 'on the lamp base. However, by loosening screw 65, the vsockettl can be turned through :any desired angle to adjust the position or" the lamp filament 56 to the optimum position. In order to simplify thisadjustment, the cylindrical wall of the socket 61 has a set of four slits which extend above the block 62 so that by inserting a screw driver or. other simple flat tool through'the diametrically opposite slots, the base can be turned to the desired angle whereupon the screw 64 can be tightened V Passing through the insulation block are two thumb screws 67,168; The block. 552 is adapted to be fastened to the adjusting. plate 69 which has its upper end Ill bent at an angle so that it is substantially parallel to the wall portion 9 when the plate B9 is in the position shown in thedrawing. The portion ll] extends above-the housing I. so as to provide sufficient clearance for the lamp socket 6!. The thumb screw 67 is threaded into a corresponding threaded opening in the portion ill while the screw 68 passes through a slot ll (Figs. 2 and 11 to 15). By this method of attachment, the block 62 can be pivoted around screw 6?, thus providing a fine adjustment of the position of the lamp with respect to the optical system. The screw 68 is locked in place by nut 12 which cooperates with a ridge 13 on the undersuriace of portion "it. In order to allow for movement of the lamp and lamp base when the block 62 is turned around screw 61, the member ID has an enlarged window or slot M.

To provide further accurate adjustments for the position of the lamp filament with respect to the optical system, the plate 69 is slidably spect to the circular shouldered portions it, each of which is adapted to engage the sides of the corresponding slots '59, 88. Each of the eccentric adjusting members has an enlarged slotted head 8i, provided with right-angled slots 82, 33, so that the eccentric members may be adjusted by an ordinary screw driver or similar simple flat-ended tool.

Referring to Figs. 11 to 15, it will be noted that the slot 19 which cooperates with the eccentric member 75 is circular so that when the head 8! is turned it causes the plate 69 to be subjected mainly to a raising and lowering determined by the eccentric throw of the member 75. Thus, by turning member 75, the lamp may be raised and lowered with respect to the housing l. On the other hand/the slot 89 is elongated so that when the member '15 is turned it causes a turning motion of the plate 69 around the member '35 as a pivot. By this combination of separate eccentrics and corresponding circular and elongated slots, it is possible to adjust the plate 59 to any desired vertical or horizontal position, some of which are shown respectively in Figs. 11 to 15 of the drawing. If only one eccentric adjustment, for example member '55, were provided, the adjusting motion of the plate 69 could not be confined to a straight-line sliding adjustment should that be necessary. However, by providing the additional eccentric adjusting non-linear sliding motion of the plate 58 by appropriate adjustment of the said member iii.

Thus, in using this adjustment arrangement, the member 15 may be turned to raise or lower the plate 59 the desired amount; During this adjustment, the plate is necessarily subjected to some pivoting motion around the member it. In order to compensate 0i neutralize this pivoting motion so as to confine the adjustment to a simple straight-line motion, the member it.

may thereupon be turned so as to move the plate 69 back to its desired straight-line position. In

order to retain the members l5 and'lii in their adjusted position preferably split ring locking washers 84, 85, are interposed between the shouldered portions 86 of each eccentric member These spring Washers are designed so as to have sufficient spring pressure to insure that the members 59, I5 and it do not change their adjusted positions evenunder abnormal shocks or Jars to which the device may be subjected in use.

By the foregoing adjustment means, it is possible expeditiously and accurately not only to adjust the focus of the lens systems but also to adjust the position of the lamp filament to its optimum relation With respect to the lens systems.

Various changes and modifications may be made in the disclosed embodiment without departing from the spirit and scope of the 111N611- tion.

What is claimed is:

1. An electro-optical unit comprising a lens system, a lamp, means to support said lamp in optical of eccentric pivots for said lamp support means, said pivots being rotatable independently of each other and thereby to adjust said lamp support means in mutually perpendicular and coplanar directions.

2. An electro-optical unit comprising a lens system, a lamp, means to support said lamp in optical alignment with said lens system, said means including a single member mounted for alignment with said lens system, a ,pair

sliding motion in mutually perpendicular and coplanar directions, said single member having a pair of openings through which pass respective eccentric adjusting devices for controlling said sliding motion.

3. An adjusting device for electro-optical devices comprising a fixed support, a single movable support mounted for sliding movement in mutually perpendicular and coplanar directions on said fixed support, a pair of eccentric studs rotatably mounted in said fixed support and passing respectively through corresponding openings in said single movable support to engage the edges of said openings.

AUSTIN G. COOLEY.

REFERENCES CITED The following references are oi record in thefile of this patent:

UNITED STATES PATENTS Finch Nov. 15, 1938 

